Frameworks: master switch to disable Halo (1/2)

-Port master switch from @Der-Schubi.
-Fixed Halo not showed at first notifiction pulldown.

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/BaseStatusBar.java

Change-Id: I93b59da79c63c3154bec1dba4490e4f4447a1564

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/BaseStatusBar.java

Conflicts:
	core/java/android/provider/Settings.java
	packages/SystemUI/src/com/android/systemui/statusbar/BaseStatusBar.java
Fix for launch app in floating mode from recents

Change-Id: I216b02a60cd46b7fef49e04fe090169c4703bcb6

Conflicts:
	packages/SystemUI/src/com/android/systemui/recent/RecentsPanelView.java

Conflicts:
	packages/SystemUI/src/com/android/systemui/recent/RecentsPanelView.java